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| <section id="power-mgt-powercap"> |
| <span id="device-tree-ibm-opal-power-mgt-powercap"></span><h1>power-mgt/powercap<a class="headerlink" href="#power-mgt-powercap" title="Link to this heading">¶</a></h1> |
| <p>The powercap sensors are populated in this node. Each child node in |
| the “powercap” node represents a power-cappable component.</p> |
| <p>For example :</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">system</span><span class="o">-</span><span class="n">powercap</span><span class="o">/</span> |
| </pre></div> |
| </div> |
| <p>The <a class="reference internal" href="../../../opal-api/opal-powercap.html#opal-get-powercap"><span class="std std-ref">OPAL_GET_POWERCAP</span></a> and <a class="reference internal" href="../../../opal-api/opal-powercap.html#opal-set-powercap"><span class="std std-ref">OPAL_SET_POWERCAP</span></a> calls take a handle for |
| what powercap property to get/set which is defined in the child node.</p> |
| <p>The compatible property for the linux driver which will be |
| “ibm,opal-powercap”</p> |
| <p>Each child node has below properties:</p> |
| <dl class="simple"> |
| <dt><cite>powercap-current</cite></dt><dd><p>Handle to indicate the current powercap</p> |
| </dd> |
| <dt><cite>powercap-min</cite></dt><dd><p>Absolute minimum possible powercap. This points to the soft powercap minimum |
| limit as exported by OCC. The powercap set in the soft powercap range may or |
| may not be maintained.</p> |
| </dd> |
| <dt><cite>powercap-max</cite></dt><dd><p>Maximum possible powercap</p> |
| </dd> |
| <dt><cite>powercap-hard-min</cite></dt><dd><p>This value points to the hard minimum powercap limit. The powercap set above |
| this limit is guaranteed unless there is a hardware failure</p> |
| </dd> |
| </dl> |
| <p>Powercap handle uses the following encoding:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">|</span> <span class="n">Class</span> <span class="o">|</span> <span class="n">Reserved</span> <span class="o">|</span> <span class="n">Attribute</span> <span class="o">|</span> |
| <span class="o">|-------|---------------|-----------|</span> |
| </pre></div> |
| </div> |
| <p>Note: The format of the powercap handle is <code class="docutils literal notranslate"><span class="pre">NOT</span></code> ABI and may change in |
| the future.</p> |
| <div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">power-mgt</span> <span class="p">{</span> |
| <span class="nc">powercap</span> <span class="p">{</span> |
| <span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,opal-powercap"</span><span class="p">;</span> |
| |
| <span class="nc">system-powercap</span> <span class="p">{</span> |
| <span class="nf">name</span> <span class="o">=</span> <span class="s">"system-powercap"</span><span class="p">;</span> |
| <span class="nf">powercap-current</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x00000002</span><span class="p">>;</span> |
| <span class="nf">powercap-min</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x00000000</span><span class="p">>;</span> |
| <span class="nf">powercap-max</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x00000001</span><span class="p">>;</span> |
| <span class="nf">powercap-hard-min</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x000000003</span><span class="p">>;</span> |
| <span class="p">};</span> |
| <span class="p">};</span> |
| <span class="p">};</span> |
| </pre></div> |
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